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Potential energy of a diatomic molecule is given by the Lennard-Jones potential, where A and B are constants

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Potential energy of a diatomic molecule is given by the Lennard-Jones potential, where A and B are constants. Find in terms of A and B, (a) the value r0 at which the energy is minimum and (b)the energy required to break up a diatomic molecule.(c) Evaluate r0 in meters and E in electron volts for the H2 molecule. In the caluculations A = 0.124*10-120 eV*m12 and B=1.488*10-60 eV*m6.